| sneak(spy, impostor, renegade, turncoat, hypocrite) |
| snitch(spy, impostor, renegade, turncoat, hypocrite) |
| snitcher(spy, impostor, renegade, turncoat, hypocrite) |
| squealer(spy, impostor, renegade, turncoat, hypocrite) |
| stool pigeon(expression, spy, impostor, renegade, turncoat) |
| tattletale(spy, impostor, renegade, turncoat, hypocrite) |
| traducer(spy, impostor, renegade, turncoat, hypocrite) |
| treasonist(spy, impostor, renegade, turncoat, hypocrite) |
| turncoat(noun, spy, impostor, renegade, traitor) |
| two-timer(spy, impostor, renegade, turncoat, hypocrite) |
| whistle-blower(spy, impostor, renegade, turncoat, hypocrite) |
| wolf(spy, impostor, renegade, turncoat, hypocrite) |
| collaborator(spy, turncoat, conspirator) |
| double agent(expression, spy, turncoat, conspirator) |
| informer(spy, turncoat, conspirator) |
| spy(turncoat, conspirator) |